Why Adopt?

So I'm a member of this great board...there are roughly 93 women and we all have kids the same age (2 years olds) so we go there and talk and discuss our lives and we've been talking for over 3 years now (since we found out we were pregnant in December 2008). We talk about careers, our kids, our other kids, pregnancies, anything goes. Recently I've been posting about our foster/adopt licensing. Yesterday another mom piped up that she would love to adopt, it weighs heavy on her heart regularly, as her nephew is newly adopted but that her husband isn't exactly on board, another momma commented that she is in the same boat. This other Momma's husband didn't understand why they would adopt since they aren't infertile. For years, adoption has been seen as the last resort to becoming parents, as second best to biological children. Another woman (who also feels lead to adopt) posed this question: why ask "why adopt" instead ask "why not adopt" and if there are valid reasons why it's not a good decision for your family, that's ok but it may open up hearts to the option. I do understand though why it isn't an option for some people. I just think that more would be open to adoption if they looked at it from a different perspective.